IMPAIRMENT OF REAL ESTATE INVESTMENTS, ASSETS HELD FOR SALE, NET AND ASSET SALES - Schedule of Company's Dispositions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) facility	Mar. 31, 2022 USD ($) facility	Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales proceeds	$ 3,230	$ 959
Net carrying value	1,812,680		$ 1,821,902
Net (loss) gain on sale	$ (70)	$ 186
Disposed of by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities | facility	1	1
Net sales proceeds	$ 3,230	$ 959
Net carrying value	3,300	773
Net (loss) gain on sale	$ (70)	$ 186